Authors:
- Origin of primary perturbation in turbulent flows. Nature
- Two mechanisms of turbulence
- Technique for computing spacio-temporal field of turbulent flow parameter oscillations
- Technique for numerical study of randomization process of oscillating parameters
- Step-by-step explanation of slow combustion transition into detonation
- The turbulence inverse problem definition and solution technique
Part of the book series: Fluid Mechanics and Its Applications (FMIA, volume 89)
Buy it now
Buying options
Tax calculation will be finalised at checkout
Other ways to access
This is a preview of subscription content, log in via an institution to check for access.
Table of contents (10 chapters)
-
Front Matter
-
Back Matter
About this book
Hydrodynamic equations well describe averaged parameters of turbulent steady flows, at least in pipes where boundary conditions can be estimated. The equations might outline the parameters fluctuations as well, if entry conditions at current boundaries were known. This raises, in addition, the more comprehensive problem of the primary perturbation nature, noted by H.A. Lorentz, which still remains unsolved. Generally, any flow steadiness should be supported by pressure waves emitted by some external source, e.g. a piston or a receiver. The wave plane front in channels quickly takes convex configuration owing to Rayleigh's law of diffraction divergence. The Schlieren technique and pressure wave registration were employed to investigate the wave interaction with boundary layer, while reflecting from the channel wall. The reflection induces boundary-layer local separation and following pressure rapid increase within the perturbation zone. It propagates as an acoustic wave packet of spherical shape, bearing oscillations of hydrodynamic parameters. Superposition of such packets forms a spatio-temporal field of oscillations fading as 1/r. This implies a mechanism of the turbulence. Vorticity existing in the boundary layer does not penetrate in itself into potential main stream. But the wave leaving the boundary layer carries away some part of fluid along with frozen-in vorticity. The vorticity eddies form another field of oscillations fading as 1/r2. This implies a second mechanism of turbulence. Thereupon the oscillation spatio-temporal field and its randomization development are easy computed. Also, normal burning transition into detonation is explained, and the turbulence inverse problem is set and solved as applied to plasma channels created by laser Besselian beams.
Reviews
From the reviews:
“This is an interesting book, whose focus is on the nature of turbulent fluctuations. … This book will be particularly intriguing to specialists in the field and also to scientists who are interested in the many aspects of scientific debate.” (Barbara Vanda Villone, Mathematical Reviews, Issue 2012 e)Authors and Affiliations
-
Inst. Physicotechnical Problems in Power Engineering, Russian Academy of Sciences (RAS), Moskva, Russian Federation
L. N. Pyatnitsky
Bibliographic Information
Book Title: Turbulence Nature and the Inverse Problem
Authors: L. N. Pyatnitsky
Series Title: Fluid Mechanics and Its Applications
DOI: https://doi.org/10.1007/978-90-481-2251-6
Publisher: Springer Dordrecht
eBook Packages: Physics and Astronomy, Physics and Astronomy (R0)
Copyright Information: Springer Science+Business Media B.V. 2009
Hardcover ISBN: 978-90-481-2250-9Published: 20 March 2009
Softcover ISBN: 978-90-481-8480-4Published: 28 October 2010
eBook ISBN: 978-90-481-2251-6Published: 22 March 2009
Series ISSN: 0926-5112
Series E-ISSN: 2215-0056
Edition Number: 1
Number of Pages: XVI, 197
Topics: Classical Mechanics, Acoustics, Models and Principles, Quantum Field Theories, String Theory, Optics, Lasers, Photonics, Optical Devices, Engineering, general